Tooth cervical clamp



I 1. w. IVORY.

TooTvH cEnvlcAL CLAMP. APPLICATION FILED DEC.23. 1921.

1,4145647. Patented May 2,1922.

4 4 i 4 vENTRzUv n I r 5 i 'A j j B 'f ,1v lll 1.

ATTORNEYS.

JAMES w. ivomr, or'i?irnfnnnrcenu,` PENNSYLVANIA.

'.roo'rH CERVICAL enriivrr.l

To all whom t Vmay. cof/acera.'y

Be it known that I, JAMES W. IVORY, a subject of the King of Great Britain, residing in the cityand-county 0f .Philadelphia, State of Pennsylvania, yhave invented anew and usful Tooth Cervical Clamp, of which the following is a specification. c

My invention consists of a tooth cervical clamp having jaws which are adapted to be firmly connected with a tooth and so hold the clamp in position thereon, one of the jaws being. adapted .to hold the gum effectively removed from a cavity in the tooth whereby the cavity is fully exposedfor an operation thereon, said jaw being adjustable on the frame by which it is carried, and other details are provided as will behereinafter fully described.

The invention is satisfactorily, -illustrated iny the. accompanying drawing, but the important instrumentalities thereof Vmay be varied, and so itis to be understood that the invention is not limited to the specific details shown and described, as long as they are within the spirit or scope of the claims.

Figure 1 represents a plan view of a tooth cervical clamp embodying my invention.

Figure 2 represents a transverse section of a portion on line 2--2 Figure 1.

. Figure 3 represents a side elevation thereof.

Figure 4 represents a longitudinal seetion thereof on line 4 4 Figure 1.

Figure 5 represents a plan View of a modification. f

Figure 6 represents a plan view of a portion of a modification. i

Figure 7 represents a transverse section on line 7-7 Figure 6.

Figure 8 represents a plan view of a portion of another modification.

Figure 9 represents a transverse section on line 9.9 Figure 8. j

Figures 10, 11, 12 and 13 represent perspective views of different forms of jaws that may be employed.- i

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings. n

` 1 and 2 designate opposite plates of the fame of the clamp, the same extending transversely from the terminals of 'the bow 3 of the frame t Y l Specification of Letters Patent.

Patented Mayaieez.

Application filed December 23,1921. Serial No. 524,367;

In the plate 1 is the recess Sxin which is' adjustable seated the shank 4 of vthe jaw 5@the latter extending angularly from the inner-end vof said shank so that its edge G Vis adapted to engage the -adjacentportion `rof'.` the neck of a Ltooth adjacent to a cavity in the latter. On the outer end of the-plate `2 is thelimb 7 whichl depends at an angle thereto and has fitted to it the operating screwy 8 which is adapted to engage the jaw 9,whose edge `1() isl adapted to engage the contiguous portion of the neck of a tooth opposite to the edge 6 of the jaw 5, the outer end of said jaw 9 having therein an eye or opening 11 which receives the limb 7 of the, plate 2, thus connecting'said jaw 9 with the latter.

. `Itvwilly be seen-that when thescrew 8 is operated it forces the jaw 9` against the portion oftheftooth .While the adjusted jaw 5 is lforced against an opposite side of the tooth and said jaws will firmly clamp the tooth, thejaw 5 thenholdingthe gum re- `moved from the cavity'in the tooth so that said .cavity is unobstructed for excavating and filling purposes.

It is also evident that as the shank of the jaw 5 is seated in the recess 3 of the plate 1 the jaw may be adjusted on the neck of the tooth relatively to the position of the cavity therein. Various means may be adapted to hold said shank and consequently the jaw in position on the plate Y1. In Fgures 1, 2, 3, and 4, I employ the screw 12 which is adapted to enter the plate 1 and have its head 13 overlap the shank 4V and tighten against the same. Inl Figures 6 and 7, I employ the bar 14 which is placed over the rshank and tightened thereagainst by the screw 15 which is passed through said bar into the plate 1.

In Figures 8 and 9 I employ the yoke 15* which is adapted to embrace the adjacent portionl of the plate 1 and is tightened against the same by the screw 16 which is passed through the upper and lower meinbers of said yoke and said plate 1. In Figure 5 the shank4 is longitudinally split or inposition onthe plate 1.

In Figures 10, 11, 12 and 13 I show the edgs of the jaws 5 of different configurations to be adapted to various contours Vof the necks of teeth which they engage so as to produce the bestv effects of engagement Aof said jaws with said necks so as to expose cavities of decayr of larger diameter that Y may be more extended laterally or lof'larger f ters Patent, is A .,l. A tooth cervical clamp consisting ofV a frame7V tooth clamping jaws, oneV of .which surface on the face of the tooth.-

I am familiar with clamps where .the

" frame with labial or lingual jawl is integral with the ir'rarne'whioh are held with Y heavy set screws that are in theway of the operator but know of none that slide in a recess madein a framethat takes up-fno more 'space than if theshank with the jaww'ere integral withl the frame it moving in a slot or groove .dovetailed into. the" thickness of jumble jaw Wiube heid .bytes ythe metal inthe frame. f

While the screw-13- will impinge on the shank .et of the jaw 5 and hold K'thefsame Y from sliding in the recessBX it is notgfor that. vpurpose Alout will server to hold the'shank in the'slot when ina packing boX or when not in use as, I wish this shank to he `held very loosely in the recess 3 so that the operator mayadjust it .very readily wherevapplying the clampto the tooth simply by the 'finger movement whether the cavity isdeep onthe 'neck' of the tooth or very shallow as itvwill be readilyrseen that when thelfjawsbare tightened to the neck of the'tooth'this adowrr ten'- sion in the recess yin the frame'.y v

n* I do not claim that this clamp'cannot'be used forlateral cavities only.` It may" also be' applied to vcavities on the .lingual neck or faces thetooth *slight in Figures 6 and 8.

jIIaving thus describedmy invention what I vclaim as 'new and desire to secure by Leting screw itted'to thelast named member andad'apted-to engagesaid opposite jaw.l 2.*In.' a` tooth cervical Vv"clamp, a frame,

toothb lampingjaws', ,onefmember having v Y 'thereina recessinwhic'hfone of said jaws is 'Y l `,adjus'tably seated, Ymea-ns VVfor retaining,V the latter named jawin position, another mem-Y ber of said frame having the oppositejaw supported thereon',A 'a -clamping'fsc'rew on the last` named member adapted to engage .said

' opposite jaw'.

3. Ina tooth cervical clampfa frame,`one

member of whichl is provided with av dependn Y Y ing limb, tooth clamping j aws'on'e of which s sustained on said limb,`and the other jaw iis adjustably' supported on and secured to anv opposite-member of-thefranie', "and a screw fitted tosaidrlimb adaptedgtlo engage N; BussENGER. Y 

